Improvement in salt-evaporators



'J.- L. HUMPHREYQ Evaporating Apparatus.

Patented Oct. 14, I856.

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IMPROVEMENT IN SALT- EVAPORATORS.

Specification folming part of Letters Patent No. h ifi i, dated October 14, 1856.

T0 aZZwZw/n it may concern Be it known that I, JAMES L. HUMPHREY,

' of Syracuse, in the county of Onondaga and State of New York, haveinvented certain new and useful Improvements in Apparatus for Evaporating Brine and other Solutions; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a longitudinal sectional elevation of an apparatus with my improvements. Fig. 2 is a plan of the same, partly in section. Fig. 3 is a detail View, whichwill be hereinafter explained.

Similar letters of reference indicate corresponding parts in the several figures.

This invention consists, chiefly, in a certain arrangement whereby the heated products of combustion from afurnace are drawn by a blower through flues passing through a closed evaporating-vessel below the surface of the brine or other liquor, and by the same blower areforced back again through the vessel over the surface of the liquor and into the chimney of the furnace, thereby using the heat from the furnace to effect evaporation both below and above the surface of the liquor, and using the draft of the chimney to carry off the evaporation.

It consists, further, in. a scraper fitting to the fines below the surface of the liquor, and having a movement back and forth along the tubes to remove the deposit which is caused to incrust itself upon them by crystallization, and which, if not removed, would prevent the heat being rapidly conducted to the liquor.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A is the covered evaporating-vessel, which may be of any convenient form.

B is a furnace, which is represented as being employed to heat a steam-boiler, O, in

which steam is generated to drive an engine employed for such purposes as may be re quiredin the manufacture of salt. This fur naee has a number of bridge-walls, a a, and curtain-walls b b at the rear of the fire-place, for the purpose of arresting and causing the fall of sparks and other particles of solid matter escaping from the fire. The evaporatingvessel. A is placed immediately in rear of the furnace B.

D D are the fines, consisting of metal tubes of any convenient size, leading from the rear of the furnace B through the whole length of the evaporating vessel and into a box, E, which stands within the rear end of said vessel, but does not extend quite tothe top thereof. (See Fig. 1.) I

Gis a fan-blower connected with the box E by side tubes, 0 c, and discharging itself into the upper part of the evaporating-vessel above the box E. i

B. This chimney stands above the front end of the evaporatingvessel, and its only communication with the furnace is through the fines D D, the box E, the blower F, and the upper part of the evaporating-vessel.

.By the above-describedarrangement of the furnace, evaporating-vessel, the fiuesD D,- the blower F, and the chimney H, the products of combustion from the furnace are drawn through the flues D D below the surface of the liquid and caused to heatit and produce evaporation, and are then forced back again over its surface, where they produce further evaporation and charge themselves with the evaporated moisture, and carry the same away to the chimney, by this latter means expediting the evaporating process.

I is a coil of pipe arranged in the rear part of the furnace, and supposed to receive the exhaust steam from the steam-engine and superheat it. This coil connects with a pipe, J, running through the evaporating-pan below the usual level of the liquid, and conveys through the liquid the superheated exhauststeam. V

K is the scraper, of which Fig.3 is a front view, consisting of a plate of metal,which has a number of holes bored in itto fit to the several flues D D and pipe J all of which are arranged parallel with each other. To the ends are to be connected with suitable mechanism the fines and pipe for the removal of the crystals deposited upon them.

L is an endless chain of. scrapers working near the bottom of the evaporating-vessel for His the chimney belonging to the furnace very much of this plate are attachedtwo rods, cl cl, which i for drawing the scraper back and forth along the purpose of scraping thesalt or other crysthe surface of thelliqnid to produce further tallized substance toward one end of the vesevaporation and carry off the evaporation to sel for the convenience of removing it. the chimney, substantially as herein described. What I claim as my invention, and desire to 2. The scraper K, fitted to the flues, and secure by Letters Patent, is-

1. The arrangement of the furnace, the 1 evaporating-vessel, to operate substantially closed evaporating-vessel, the flues D D, the as herein set forth. blower F, and the chimney H whereby the products of combustion are drawn through the JAMES HUMPHREY' evaporating-vessel below the surface of the \Vitnesses: liquidto produce evaporation by heat, and afp O. J. HUNT, tel-ward driven in the opposite direction over A. REYNoLns.

pipes which pass through the liquid in the 

